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2005-10-05 07:00:00

Five hundred years ago, Leonardo Da Vinci solved an ancient astronomical riddle: the mystery of Earthshine. NASA -- When you think of Leonardo Da Vinci, you probably think of the Mona Lisa or 16th-century submarines or, maybe, a certain suspenseful novel. That's old school. From now on, think of the Moon. Little-known to most, one of Leonardo's finest works is not a painting or an invention, but rather something from astronomy: He solved the ancient riddle of Earthshine. You can see...